His abs are really sculpted, you guys.

Justin Bieber is the newest face and body of Calvin Klein's underwear ad campaign, and we'll be honest; it's making us feel a little weird. For years, our brains have been hardwired to always fancy the CK guy in his pants, but this is Justin Bieber - he of floppy-haired, Baby fame, who we've also been somewhat hardwired to hate a bit.

That said, the topless singer is showing off some impressive sculpted abs as he gets hot and heavy with Lara Stone and pulls her in for a kiss. He's also spotted drumming really fast, having his torso fondled by Lara and throwing a few beguiling looks in the direction of the camera. See? Really weird.

Nobody wears those white briefs quite like Mark Wahlberg - who donned them two years before Justin was born - but we have a feeling that these shots may make a Belieber out of some of you yet.

In the meantime, let's be thankful they've mercifully left out the standard crotch grab shot. Call us prudes, but we can't handle much more suggestive behaviour from the Biebs.

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